Adjustable reciprocating mechanical movement



April 1960 R. E. ROSENDAHL 2,933,929

ADJUSTABLE RECIPROCATING MECHANICAL MOVEMENT Filed April 1, 1957 2 Sheets-Sheet l v NF 9 U g LL.

INVENTOR. g RUSSELL E. ROSENDAHL ATTORNEY April 1960 R. E. ROSENDAHL 2,933,929

ADJUSTABLE RECIPROCATING MECHANICAL MOVEMENT Filed April 1, 1957 2 Sheets-Sheet 2 3m g; 9 LL 0 N N N 0 w a \5 11 10 8 INVENTOR. RUSSELL E. ROSENDAHL ATTORNEY United States Patent ADJUSTABLE REClgllfgCATlNG MECHANICAL Application April 1, 1957, Serial No. 650,013 7 '6 Claims. or. 74-37 This invention relates to adjustable stroke reciprocating and oscillating mechanical movement; and, more particularly is directed to adjustable stroke of reciprocating movement for blood trays in connection with cystoscopic tables.

Due to non-standardization between manufacturers and non-uniformity ofany one line of manufacture of cystoscopic tables having slidably blood trays, the blood trays have heretofore been moved in and out of position by a nurse at the command of the surgeon. By this invention, the blood trays may be moved into position and out of position by the surgeons pressure on a single pole foot switch; and, the stroke may be adjusted in either direction, independently of the other, to meet the requirements of each individual cystoscopic table.

An object of this invention is to provide a device changing rotary motion into an adjustable reciprocatory motion :in which the stroke may be adjusted in either direction independently of the other direction.

Another object of this invention is to provide a device of the class describedwith a connecting link between the device and hospital devices to impart reciprocal motion to the hospital devices.

Another object ofthis invention is to provide a device of the class described which may be mounted on any existing cystoscopic table and move blood trays in and out of position, as desired, by the operation of a single pole foot switch, by the attending'or operating surgeon.

The foregoing and other objects and advantages of this invention will be more apparent from reading the following specifications, in conjunction with the drawings. forming a part thereof, wherein:

and fastened to the carriage 20 by means of bolts 22.

The carriage is thus freely movable rails or rods 16.

The carriage 20 has a pair of elongated apertures in the top thereof. Each of 'theapertures 25 are positioned substantially over the chain 14 and over different sides of the path of travel of the chain 14; and, each of the elongated apertures 25 are substantially parallel to the path of travel of the chain 14. Mounted underneath or on the bottom side of the carriage 20 are a pair of pusher blocks 27 which are secured or fastened to the carriage 20 by means of bolts 28 inserted through the apertures 25 and threadedly engaging the pusher blocks 27 in a conventional tapped block manner. The pusher blocks may be adjustably positioned, by the releasing and tightening of the bolts.28, in any desired position along the length of the elongated aperture 25.

The'carriage 20 has mounted thereon, preferably by along the length of the pivotal connection, a pusher bar 30. This pusher bar 30 has one end thereof fastened to the carriage by means of a bracket 31, secured to the top of the carriage 20, and

' Fig. 1 is a side elevational view of the device of this invention, a fragment removed to show working parts;

Fig. 2 is a plan view of the device of this invention; Fig. 3 is an end view of the device of this invention; and

Fig. 4 is a bottom view of the traversing carriage, showing the adjustability of the pusher blocks.

Referring to the drawings wherein like members are I given the same reference numeral, an electric motor'l is actuated by a single pole foot switch-2, and, through a reduction gear 3, turns a shaft 4 to which is mounted a horizontal driving sprocket 5, positioned in one end of. I

an elongated housing member 7. Spaced from and in the same plane as the driving sprocket 5, and at the other end of the housing 7 is a driven sprocket 6 mounted for free rotation on a shaft 11 parallel to the other shaft 4, I

jfbelow the housing 7. A carriage 20 is provided with rollers 21, engagingthe rails or bars 16, and positioned a pivot pin-32 passing through aligned apertures in the bracket 32 and end of the pusher bar 30, according to standard conventional practices. The free end of the pusher bar terminates in an elongated bracket member 35 perpendicular to but in substantially the same plane as the pusher bar 30. This elongated bracket 35 has a pair of downwardly extending spaced projections 36 and 3.7 to provide a channel therebetween to receive the lip of a standard blood tray used with. cystoscopic tables. The face of one of these projections 37 is provided with apertures 38 to receive bolts for fastening the lip of the blood tray into the channel defined by the projections 36 and 37. a v

One link of the chain 14 is provided with a vertically extending pin 40 rigidly secured thereto. This pin 40 upon rotation of the chain 14, contacts one pusher block 27 fastened to the carriage 20 and pushes the carriage towards the sprocket. As illustrated in Fig. 2, with the direction of motion as indicated on the sprocket, the pin 40 will-push the carriage towards the driven sprocket 6 and when the chain starts following the arcuate path of the driven sprocket 6, the pin 40 will be freed .from the pusher block 27 leaving the carriage at that point until the pin 40 contacts the other pusher block 27; and moves the carriage in the reverse direction to the driving sprocket 5. It is now seen that, by the longitudinal adjustment of the pusher blocks 27 across the face of the carriage 20 by means of the bolts 28 in the elongated aperturesJ25, the travel of the carriage in either direction, may 'be, adjusted within the limits of the diameter of thersprockets.

The device is mounted to a cystoscopic examination table by bracket means,'-including a bracket 45 secured to the frame 7 by a bolt 46 at the end of the housing near the driving sprocket 5, and a pair of bosses 48 receive bolts 49 to secure a pair of arms 51 to the housing 7 near the driven sprocket 6. The free ends of these arms 51 have spacer bolts 54 mounted therein. These spacer bolts 54 have pivotally mounted thereon, mountingbrackets 56 substantially parallel to the bars 51 and provided with apertures 58 to receive bolts or screws for fastening to the cystoscopic table or blood tray guide rails according to the requirements of each individualinstallation.

The motor 1 may be positioned any place, but experience has indicated that it is advisable to mount themotor in a conventional manner to the housing 7 by meansof a standard motor bracket mount 60.

In operation the device is quite simple and eflicient. The operating physician and surgeon by placing his foot on the foot control 2 actuates the motor 1, which, through the reduction gear 3, rotates the shaft 4 to drive the driving sprocket 5 in the direction indicated in Fig.2. This drives the sprocket 6, through movement of the chain 14, to position the pin 40 in abutment with one of the pusher blocks 27 to move the carriage, pusher bar 39, bracket 35 and a blood tray attached thereto, towards the driven.

sprocket 6. When the carriage approaches the driven sprocket 6, the pin 40 will leave the face of the pusher block 27 at a predetermined position, on the circumfer- 'ence of the driven sprocket 6, as determined by the setting of the pusher block 27, by the bolt 28 in the aperture 25. After the pin 40 has passed around the circumference of the driven sprocket 6, it will abut the other pusher block 27 and return the carriage, and all parts attached thereto, towards the driving sprocket 5. As it approaches the driving sprockets, the pin 40 will again leave the face of the pusher block 27 at a point on the circumference of the sprocket depending upon the adjustable setting of that block. Upon passing around the circumfe'rence of the driving sprocket 5, the pin 40 is in position to again abut the first mentioned pusher block 27 and drive the carriage towards the driven sprocket 6. When the physician or surgeon does not have his foot pressed against the foot control switch 2, the motor is not actuated andth'e elements remain in their position, "until again actuated by the physician or surgeon'pressing on the foot control 2.

By the adjustment of the position of the pusher block 27, by means of the bolts 28 in the elongated apertures 25, the length of stroke or travel of the carriage 20 may be adjusted in either direction, independently of each other. This is necessary, due to non-uniformity and nonstandardization of manufacturers and within the production of a manufacturergin order to control the travel of the blood tray attached to the device to prevent its abutment with other structure in'its inward movement and also in its outward movement.

The invention has been described in great detail but it is clearly understood thatit is not so limited. Many' changes and modifications canbe made therein without 'departing from the spirit-and scope of the invention as deiine'd in the appended claims.

-Having thus described the invention what is claimed as ne'w and desired'to secure by grant of United'States Letters Patent is:

'1. In a mechanical movement, the combination of -a pairjof spaced sprockets mounted in the same plane, a co'ntinuous chain operably connecting said sprockets, means for driving one of'said sprockets, selective means controlling driving and nondriving of said sprockets, a carriage'mounted for free traverse between said sprockets, elongated apertures on opposed sides of the top of said carriage and positioned over opposite parallel portions of -said'continuous chain, bolts slideably, positioned in said "apertures,'a pair of-tapped pusher blocks threadedly en- -'ga'ging saidboltsto secure' said blocks to said carriage in predetermined position, a pusher pin rigidly secured to "said chain and positioned to abut one of said pusher blocks in one directionand the other of said pusher blocks in the opposite direction, a' pusher bar connected to said "carriage, and a securingbracket mounted on the free end of said pusher bar.

2. In a mechanical movement, the combination of a housing, a pair of spaced sprockets mounted in the same plane and parallel shafts in said housing, a continuous chain operably connecting said sprockets, means for driv- -ing' one of said sprockets, selective means controlling driving and non driving of said sprockets, a pair of spaced parallel rails supported by said housing, a carriage J mounted onsaid rails for free traverse between said sprockets and above said chain, elongated apertures in the top of and on opposed sides of said carriage and po'sitioned over opposite parallel portions of said continuous chain, a bolt slideably positioned in each of said apertures, a tapped pusher block threadedly engaging each of said bolts securing said blocks to. saidacarriage .in predetermined position, a vertical pin secured to said chain and positioned to abut one of said pusher blocks in one direction and the other of said pusher blocks in the opposite direction, a pusher bar connected to said carriage, and a 5 securing bracket mounted on the free end of said pusher bar.

3. In a mechanical movement, the combination of a housing a pair of spaced sprockets mounted in the same plane and on parallel shafts in, said housing, a continuous chain operably connecting said sprockets in a horizontal plane, means for driving one of said sprockets, selective means controlling driving and non driving of said sprockets, a pair of spaced parallel rails mounted beneath said housing, a carriage mounted above said housing by means of rollers engaging said rails and secured to said carriage by spacer bolts, elongated apertures in the top of and on opposed sides of said carriage and positioned over opposite parallel portions of said continuous chain, a bolt slideably positioned in each of said apertures, a tapped pusher block threadedly engaging each of said bolts to secure-said block to said carriage in predetermined position, a pusher pin secured to said chain and positioned to abut one of said pusher blocks in one direction and the other of said pusher blocks in the opposite direction, a pusher bar connected to said carriage, and securing bracket mounted on the free end of said pusher bar.

4. 'In a mechanical movement, the combination of ,a housing a pair of spaced sprockets mounted in the same plane and on parallel shafts in said housing, a continuous chain operably connecting said sprockets in a horizontal plane, means for driving one of said sprockets, selective means controlling driving and non driving of said sprockets, a pair of spaced parallel rails mounted beneath' said housing, a carriage mounted above said housing by means of rollers engaging said rails and secured to said carriage by spacer bolts, elongated apertures in the top of and on opposed sides of said carriage and positioned over opposite parallel portions of said continuous chain, a bolt slideably positioned in each of said apertures, a tapped pusher block threadedly engaging each of said bolts to secure saidblock to said carriage in predetermined position, a pusher pin secured to said chain and positioned to abut one of ,said pusher blocks in traveling between the sprockets in the opposite direction, a pusher bar connected to said carriage, and a securing bracket mounted on the free end of said pusher bar.

5 In a mechanical movement, the combination of ,a 50 housing, a pair of spaced sprockets mounted in the same plane and on parallel shafts in said housing, .a continuous chain operably connecting said sprockets in .a horizontal plane, means for driving one of said sprockets, selective means controlling driving and non driving 65. of said sprockets, a carriage mounted above said-chain and predetermined distance for free traverse between {said sprockets, adjustable means for predetermining the traverse of said carriage in either direction, said adjustable means comprising a pair of apertures elongated 60 in therdirection of travel and positioned in the top of said carriage and over the opposite and parallel portions of said continuous chain, a bolt slideably positioned in a each of said apertures, a. tapped pusher block threadedly engaging each of said bolts to releasably and adjustably 657 secure said blocks to said carriage in predetermined position, a vertical pin secured to said chain and positioned tomove one of said pusher blocks and carriage secured thereto in one direction between thesprockets and the other of said pusher blocks in the opposite 70 direction upon further movementof the chain.

6. In a mechanical movement, the combination oft-a pair of spaced sprockets mounted in the same plane on parallel shafts, a continuous chain operably connecting said sprockets, means for driving one of saidsprockets 75,in,;one direction, selective means controlling driving and non driving of said sprockets, a carriage mount spaced from said sprockets a predetermined distance for traverse between said sprockets in either direction, elongated apertures in said carriage top and over opposite parallel portions of said continuous chain, bolts slideably positioned in said apertures, tapped pusher blocks engaging each of said bolts to releasably and adjustably fasten said blocks to said carriage in predetermined position along the length of each elongated aperture, a pusher pin secured to said chain and positioned to abut one of said pusher blocks in one direction and the other of said pusher blocks in the opposite direction to impart reciprocatory movement to said carriage the stroke as determined by the setting of the blocks along the length of each elongated aperture.

References Cited in the file of this patent UNITED STATES PATENTS Huse Mar. 16, 1909 Wood May 15, 1917 Hards Sept. 11, 1917 Kunz Oct. 16, 1934 Richmond et a1. July 22, 1952 Andrews Feb. 17, 1953 FOREIGN PATENTS 7 Norway Dec.'4, 1922 

